<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>p3_元素阴影</title>

    <style>
        div{
            width: 300px;
            height: 100px;
            background-color: #0aa1ed;
            margin: 100px auto 0;
            border-radius: 50px;
            /* X轴偏移量 Y轴偏移量 羽化值 阴影扩展半径 阴影颜色 内部阴影:inset*/
            box-shadow: 5px 5px 5px 5px grey;
        }
    </style>

</head>
<body>

<div></div>

</body>
</html>